1
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Kröckert KW, Garg F, Heck J, Heinz MV, Lange J, Schmidt R, Hoffmann A, Herres-Pawlis S. ATRP catalysts of tetradentate guanidine ligands - do guanidine donors induce a faster atom transfer? Dalton Trans 2024. [PMID: 38258473 DOI: 10.1039/d3dt03392a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Tripodal tetradentate N donor ligands stabilise the most active ATRP catalyst systems. Here, we set out to synthesise the new guanidine ligand TMG-4NMe2uns-penp, inspired by p-substituted tris(2-pyridylmethyl)amine (TPMA) ligands. The impact of changing pyridine against guanidine donors was examined through solid state and solution experiments and density functional theory (DFT) calculations. In the solid state, the molecular structures of copper complexes based on the ligands TMG-4NMe2uns-penp, TMG-uns-penp and TMG3tren were discussed concerning the influence of a NMe2 substituent at the pyridines and the guanidine donors. In solution, the TMG-4NMe2uns-penp system was investigated by several methods, including UV/Vis, EPR and NMR spectroscopy indicating similar properties to that of the highly active TPMANMe2 system. The redox potentials were determined and related to the catalytic activity. Besides the expected trends between these and the ligand structures, there is evidence that guanidine donors in tripodal ligand systems lead to a better deactivation and possibly a faster exchange within the ATRP equilibrium than TPMA systems. Supported by DFT calculations, it derives from an easier cleavable Cu-Br bond of the copper(II) deactivator species. The high activity was stated by a controlled initiator for continuous activator regeneration (ICAR) ATRP of styrene.
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Affiliation(s)
- Konstantin W Kröckert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Felix Garg
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Joshua Heck
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Michel V Heinz
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Justin Lange
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Regina Schmidt
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Sonja Herres-Pawlis
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
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2
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Zymaková A, Precek M, Picchiotti A, Błachucki W, Zymak I, Szlachetko J, Vankó G, Németh Z, Sá J, Wiste T, Andreasson J. X-ray spectroscopy station for sample characterization at ELI Beamlines. Sci Rep 2023; 13:17258. [PMID: 37828024 PMCID: PMC10570313 DOI: 10.1038/s41598-023-43924-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 09/30/2023] [Indexed: 10/14/2023] Open
Abstract
X-ray spectroscopy is a demanded tool across multiple user communities. Here we report on a new station for X-ray emission spectroscopy at the Extreme Light Infrastructure Beamlines Facility. The instrument utilizes the von Hamos geometry and works with a number of different sample types, notably including liquid systems. We demonstrate a simple and reliable method for source position control using two cameras. This approach addresses energy calibration dependence on sample position, which is a characteristic source of measurement uncertainty for wavelength dispersive spectrometers in XES arrangement. We also present a straightforward procedure for energy calibration of liquid and powder samples to a thin film reference. The developed instrumentation enabled us to perform the first experimental determination of the Kα lines of liquidized K3Fe(CN)6 as well as powdered and liquidized FeNH4(SO4)2. Finally, we report on proof-of-principle use of a colliding jet liquid sample delivery system in an XES experiment.
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Affiliation(s)
- A Zymaková
- ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic.
| | - M Precek
- ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic
| | - A Picchiotti
- ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic
- Hamburg University and The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - W Błachucki
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342, Kraków, Poland
| | - I Zymak
- ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic
| | - J Szlachetko
- National Synchrotron Radiation Centre SOLARIS, Czerwone Maki 98, 30-392, Kraków, Poland
| | - G Vankó
- Wigner Research Centre for Physics, Konkoly-Thege Miklós 29-33, Budapest, 1121, Hungary
| | - Z Németh
- Wigner Research Centre for Physics, Konkoly-Thege Miklós 29-33, Budapest, 1121, Hungary
| | - J Sá
- Uppsala University, Lägerhyddsvägen 1, SE-751 05, Uppsala, Sweden
| | - T Wiste
- ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic
| | - J Andreasson
- ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic
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3
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Interplay of electronic and geometric structure on Cu phenanthroline, bipyridine and derivative complexes, synthesis, characterization, and reactivity towards oxygen. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Raßpe-Lange L, Hoffmann A, Gertig C, Heck J, Leonhard K, Herres-Pawlis S. Geometrical benchmarking and analysis of redox potentials of copper(I/II) guanidine-quinoline complexes: Comparison of semi-empirical tight-binding and DFT methods and the challenge of describing the entatic state (part III). J Comput Chem 2023; 44:319-328. [PMID: 35640228 DOI: 10.1002/jcc.26927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/14/2022] [Accepted: 04/20/2022] [Indexed: 01/03/2023]
Abstract
Copper guanidine-quinoline complexes are an important class of bioinorganic complexes that find utilization in electron and atom transfer processes. By substitution of functional groups on the quinoline moiety the electron transfer abilities of these complexes can be tuned. In order to explore the full substitution space by simulations, the accurate theoretical description of the effect of functional groups is essential. In this study, we compare three different methods for the theoretical description of the structures. We use the semi-empirical tight-binding method GFN2-xTB, the density functional TPSSh and the double-hybrid functional B2PLYP. We evaluate the methods on five different complex pairs (Cu(I) and Cu(II) complexes), and compare how well calculated energies can predict the redox potentials. We find even though B2PLYP and TPSSh yield better accordance with the experimental structures. GFN2-xTB performs surprisingly well in the geometry optimization at a fraction of the computational cost. TPSSh offers a good compromise between computational cost and accuracy of the redox potential for real-life complexes.
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Affiliation(s)
- Lukas Raßpe-Lange
- Institute of Technical Thermodynamics, RWTH Aachen University, Aachen, Germany
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Christoph Gertig
- Institute of Technical Thermodynamics, RWTH Aachen University, Aachen, Germany.,Pharmaplan AG, Basel, Switzerland
| | - Joshua Heck
- Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Kai Leonhard
- Institute of Technical Thermodynamics, RWTH Aachen University, Aachen, Germany
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5
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Atom engineering-regulated in situ transition of Cu(I)-Cu(II) for efficient overcoming cancer drug resistance. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1340-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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6
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Kröckert KW, Garg F, Heinz MV, Lange J, Simões PP, Schmidt R, Bienemann O, Hoffmann A, Herres-Pawlis S. Understanding the structure-activity relationship and performance of highly active novel ATRP catalysts. Dalton Trans 2022; 51:13272-13287. [PMID: 35983714 DOI: 10.1039/d2dt01954j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper bromide complexes based on a series of substituted guanidine-quinolinyl and -pyridinyl ligands are reported. The ligand systems were chosen based on the large variation with regard to their flexibility in the backbone, different guanidine moieties and influence by electron density donating groups. Relationships between the molecular structures and spectroscopic and electronic properties are described. Beside the expected increase in activity by substituting the 4-position (NMe2vs. H), we showed that a higher flexibility, such as TMG vs. DMEG moiety, leads to a better stabilsiation of the copper(II) complex. Due to the correlation of the potentials and KATRP values, the catalyst based on the ligand TMGm4NMe2py is the most active copper complex for ATRP with a bidentate ligand system. The combination of the strong donating abilities of dimethylamine pyridinyl, the donor properties of the TMG substituent, and the improved flexibility due to the methylene bridging unit leads to high activity. With all NMe2-substituted systems standard ATRP experiments were conducted and with more active NMe2-substituted pyridinyl systems, ICAR ATRP experiments of styrene were conducted. Low dispersities and ideal molar masses have been achieved.
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Affiliation(s)
- Konstantin W Kröckert
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Felix Garg
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Michel V Heinz
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Justin Lange
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Patricia P Simões
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Regina Schmidt
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Olga Bienemann
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Str. 6, 44227 Dortmund, Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
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7
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Griffin PJ, Charette BJ, Burke JH, Vura-Weis J, Schaller RD, Gosztola DJ, Olshansky L. Toward Improved Charge Separation through Conformational Control in Copper Coordination Complexes. J Am Chem Soc 2022; 144:12116-12126. [PMID: 35762527 DOI: 10.1021/jacs.2c02580] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The continued development of solar energy as a renewable resource necessitates new approaches to sustaining photodriven charge separation (CS). We present a bioinspired approach in which photoinduced conformational rearrangements at a ligand are translated into changes in coordination geometry and environment about a bound metal ion. Taking advantage of the differential coordination properties of CuI and CuII, these dynamics aim to facilitate intramolecular electron transfer (ET) from CuI to the ligand to create a CS state. The synthesis and photophysical characterization of CuCl(dpaaR) (dpaa = dipicolylaminoacetophenone, with R = H and OMe) are presented. These ligands incorporate a fluorophore that gives rise to a twisted intramolecular charge transfer (TICT) excited state. Excited-state ligand twisting provides a tetragonal coordination geometry capable of capturing CuII when an internal ortho-OMe binding site is present. NMR, IR, electron paramagnetic resonance (EPR), and optical spectroscopies, X-ray diffraction, and electrochemical methods establish the ground-state properties of these CuI and CuII complexes. The photophysical dynamics of the CuI complexes are explored by time-resolved photoluminescence and optical transient absorption spectroscopies. Relative to control complexes lacking a TICT-active ligand, the lifetimes of CS states are enhanced ∼1000-fold. Further, the presence of the ortho-OMe substituent greatly enhances the lifetime of the TICT* state and biases the coordination environment toward CuII. The presence of CuI decreases photoinduced degradation from 14 to <2% but does not result in significant quenching via ET. Factors affecting CS in these systems are discussed, laying the groundwork for our strategy toward solar energy conversion.
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Affiliation(s)
- Paul J Griffin
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Bronte J Charette
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - John H Burke
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Josh Vura-Weis
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David J Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Lisa Olshansky
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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8
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Abstract
Metal-containing polymers, or metallopolymers, have diverse applications in the fields of sensors, catalysis, information storage, optoelectronics, and neuromorphic computing, among other areas. The approach of metal-templated subcomponent self-assembly using dynamic covalent linkages allows complex architectures to be formed with relative synthetic ease. The dynamic nature of the linkages between subunits in these systems facilitates error checking during the assembly process and also provides a route to disassemble the structure, rendering these materials recyclable. This Account summarizes a class of double-helical metallopolymers. These metallopolymers are formed via subcomponent self-assembly and consist of two conjugated helical strands wrapping a linear array of CuI centers. Starting from discrete model helicates, we discuss how, through the judicious design of subcomponents, long helical metallopolymers can be obtained and detail their subsequent assembly into nanometer-scale aggregates. Two approaches to generate these helical metallopolymers are compared. We describe methods to govern (i) the length of the metallopolymers, (ii) the relative orientations (head-to-head vs head-to-tail) of the two organic strands, and (iii) the screw-sense of the double helix. Achieving structural control allowed the growth behavior of these systems to be probed. The structure influenced properties in ways that are relevant to specific applications; for example, the length of the metallopolymer determines the color of the light it emits in solution. In the solid state, the ionic nature of these helices renders them useful as both emitters and ionic additives in light-emitting electrochemical cells. Moreover, recent experimental work has clarified the role of the linear array of Cu ions in the transport of charge through these materials. The conductivity displayed by a film of metallopolymer depends upon its history of applied voltage and current, behavior characteristic of a memristor. In addition to the prospective applications already identified, others may be on the horizon, potentially combing stimuli-responsive electronic behavior with the chirality of the helical twist.
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Affiliation(s)
- Jake L. Greenfield
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, London W12 0BZ, United Kingdom
| | - Jonathan R. Nitschke
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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9
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Benesperi I, Michaels H, Edvinsson T, Pavone M, Probert MR, Waddell P, Muñoz-García AB, Freitag M. Dynamic dimer copper coordination redox shuttles. Chem 2022. [DOI: 10.1016/j.chempr.2021.10.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Heck J, Metz F, Buchenau S, Teubner M, Grimm-Lebsanft B, Spaniol TP, Hoffmann A, Rübhausen MA, Herres-Pawlis S. Manipulating electron transfer – the influence of substituents on novel copper guanidine quinolinyl complexes. Chem Sci 2022; 13:8274-8288. [PMID: 35919707 PMCID: PMC9297705 DOI: 10.1039/d2sc02910c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 06/11/2022] [Indexed: 11/21/2022] Open
Abstract
Copper guanidine quinolinyl complexes act as good entatic state models due to their distorted structures leading to a high similarity between Cu(i) and Cu(ii) complexes. For a better understanding of the entatic state principle regarding electron transfer a series of guanidine quinolinyl ligands with different substituents in the 2- and 4-position were synthesized to examine the influence on the electron transfer properties of the corresponding copper complexes. Substituents with different steric or electronic influences were chosen. The effects on the properties of the copper complexes were studied applying different experimental and theoretical methods. The molecular structures of the bis(chelate) copper complexes were examined in the solid state by single-crystal X-ray diffraction and in solution by X-ray absorption spectroscopy and density functional theory (DFT) calculations revealing a significant impact of the substituents on the complex structures. For a better insight natural bond orbital (NBO) calculations of the ligands and copper complexes were performed. The electron transfer was analysed by the determination of the electron self-exchange rates following Marcus theory. The obtained results were correlated with the results of the structural analysis of the complexes and of the NBO calculations. Nelsen's four-point method calculations give a deeper understanding of the thermodynamic properties of the electron transfer. These studies reveal a significant impact of the substituents on the properties of the copper complexes. Copper guanidine quinolinyl complexes act as good entatic state models for the electron transfer due to a high similarity between the corresponding Cu(i) and Cu(ii) complexes. The introduction of substituents leads to a further enhancement.![]()
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Affiliation(s)
- Joshua Heck
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Fabian Metz
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Sören Buchenau
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Melissa Teubner
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Benjamin Grimm-Lebsanft
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
| | - Michael A. Rübhausen
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Sonja Herres-Pawlis
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany
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11
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Wang W, Pan X, Yang H, Wang H, Wu Q, Zheng L, Xu B, Wang J, Shi X, Bai F, Liu H. Bioactive Metal-Organic Frameworks with Specific Metal-Nitrogen (M-N) Active Sites for Efficient Sonodynamic Tumor Therapy. ACS NANO 2021; 15:20003-20012. [PMID: 34860487 DOI: 10.1021/acsnano.1c07547] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Sonodynamic therapy (SDT) offers an efficient noninvasive strategy for cancer treatment. However, the efficiency of SDT is limited by the structural and physicochemical properties of ultrasound (US)-sensitive agents. Here, we discover the combination of bioactivity and sonodynamic properties of zeolite imidazolium framework-8 nanocrystals (ZIF-8 NCs) for efficient tumor therapy. ZIF-8 NCs are susceptible to biodegradation to release zinc ions (Zn2+) triggered by the weakly acidic tumor microenvironment, demonstrating the bioactivity to induce apoptosis in cancer cells. Density functional theory calculations combined with experiments revealed that the unsaturated zinc-nitrogen (Zn-N) active sites on the surface of ZIF-8 NCs allow an enhanced electron transfer via ligand to metal charge transfer bands from the highest occupied molecular orbitals to the lowest unoccupied molecular orbitals. This process is critical for the generation of reactive oxygen species by metal-organic frameworks (MOFs) under US irradiation. In vivo experiments show that ZIF-8 NCs exhibit high tumor inhibition efficiency (84.6%) as both a bioactive anticancer agent and a sonosensitizer. We believe that this study can expand the application of MOFs and contribute to a better understanding of the mechanism of action of sonosensitizers.
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Affiliation(s)
- Weiwei Wang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Bionanomaterials & Translational Engineering Laboratory, State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
- School of the Environment, Nanjing University, Nanjing 210023, China
| | - Xueting Pan
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Bionanomaterials & Translational Engineering Laboratory, State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hailong Yang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Bionanomaterials & Translational Engineering Laboratory, State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hui Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Qingyuan Wu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Bionanomaterials & Translational Engineering Laboratory, State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Bolong Xu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Bionanomaterials & Translational Engineering Laboratory, State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jinghan Wang
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Xinghua Shi
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Feng Bai
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Huiyu Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Bionanomaterials & Translational Engineering Laboratory, State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
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12
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Zymaková A, Albrecht M, Antipenkov R, Špaček A, Karatodorov S, Hort O, Andreasson J, Uhlig J. First experiments with a water-jet plasma X-ray source driven by the novel high-power-high-repetition rate L1 Allegra laser at ELI Beamlines. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:1778-1785. [PMID: 34738931 PMCID: PMC8570212 DOI: 10.1107/s1600577521008729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
ELI Beamlines is a rapidly progressing pillar of the pan-European Extreme Light Infrastructure (ELI) project focusing on the development and deployment of science driven by high-power lasers for user operations. This work reports the results of a commissioning run of a water-jet plasma X-ray source driven by the L1 Allegra laser, outlining the current capabilities and future potential of the system. The L1 Allegra is one of the lasers developed in-house at ELI Beamlines, designed to be able to reach a pulse energy of 100 mJ at a 1 kHz repetition rate with excellent beam properties. The water-jet plasma X-ray source driven by this laser opens opportunities for new pump-probe experiments with sub-picosecond temporal resolution and inherent synchronization between pump and probe pulses.
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Affiliation(s)
- Anna Zymaková
- Structural Dynamics, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Martin Albrecht
- X-ray sources, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Roman Antipenkov
- L1 Allegra Laser, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Alexandr Špaček
- L1 Allegra Laser, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Stefan Karatodorov
- X-ray sources, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Ondřej Hort
- X-ray sources, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Jakob Andreasson
- Structural Dynamics, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic
| | - Jens Uhlig
- Division of Chemical Physics, Lund University, Box 117, Lund 22100, Sweden
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13
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Frank P, Benfatto M. Symmetry Breaking in Solution-Phase [Cu(tsc) 2(H 2O) 2] 2+: Emergent Asymmetry in Cu-S Distances and in Covalence. J Phys Chem B 2021; 125:10779-10795. [PMID: 34546762 DOI: 10.1021/acs.jpcb.1c05022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The structure of aqueous Cu(II)-bis-thiosemicarbazide, [Cu(tsc)2]2+, is reported following EXAFS and MXAN analyses of the copper K-edge X-ray absorption (XAS) spectrum. The rising K-edge feature at 8987.1 eV is higher energy than those of crystalline models, implying unique electronic and structural solution states. EXAFS analysis (k = 2-13 Å-1; 2 × Cu-N = 2.02 ± 0.01 Å; 2 × Cu-S = 2.27 ± 0.01 Å; Cu-Oax = 2.41 ± 0.04 Å) could not resolve 5- versus 6-coordinate models. However, MXAN fits converged to an asymmetric broken symmetry 6-coordinate model with cis-disposed TSC ligands (Cu-Oax = 2.07 and 2.54 Å; Cu-N = 1.94 Å, 1.98 Å; Cu-S = 2.20 Å, 2.41 Å). Transition dipole integral evaluation of the sulfur K-edge XAS 1s → 3p valence transition feature at 2470.7 eV yielded a Cu-S covalence of 0.66 e-, indicating Cu1.34+. The high Cu-S covalence and short Cu-S bond in aqueous [Cu(tsc)2(H2O)2]2+ again contradict the need for a protein rack to explain the unique structure of the blue copper active site. MXAN models of dissolved Cu(II) complex ions have invariably featured broken centrosymmetry. The potential energy ground state for dissolved Cu(II) evidently includes the extended solvation field, providing a target for improved physical theory. A revised solvation model for aqueous Cu(II), |[Cu(H2O)5]·14H2O|2+, is presented.
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Affiliation(s)
- Patrick Frank
- Stanford Synchrotron Radiation Lightsource, SLAC, Stanford University, Menlo Park, California 94025, United States.,Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Maurizio Benfatto
- Laboratori Nazionali di Frascati-INFN, P.O. Box 13, 00044 Frascati, Italy
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14
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Steuer L, Kaifer E, Himmel HJ. On the metal-ligand bonding in dinuclear complexes with redox-active guanidine ligands. Dalton Trans 2021; 50:9467-9482. [PMID: 34136887 DOI: 10.1039/d1dt01354h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Coordination compounds with redox-active ligands are currently intensively studied. Within this research theme, redox-active guanidines have been established as a new, eminent class of redox-active ligands. In this work the variation of metal-guanidine bonding in dinuclear transition metal complexes with bridging redox-active tetrakisguanidine ligands is analysed. A series of dinuclear complexes with different metals (Mn, Fe, Co, Ni, Cu and Zn) is synthesized, using either newly prepared redox-active tetrakisguanidino-dioxine or previously reported tetrakisguanidino-benzene ligands. The discussion of the bond properties in this work is predominantly based on the trends of structural parameters, derived from determination of single-crystal structures by X-ray diffraction and quantum chemical calculations. In addition, the trends in the redox potentials and magnetometric (SQUID) measurements on some of the complexes are included. Due to their combined σ- and π-electron donor capability, redox-active guanidine ligands are weak-field ligands; the σ- and π-bonding contributions vary with the metal. The results highlight the peculiarity of copper-guanidine bonding with a high π-bond contribution to metal-guanidine bonding, enabled by structural distortion of the coordination mode from tetrahedral in the direction of square-planar, short copper-guanidine bonds and minor displacement of the copper atoms from the ligand aromatic plane.
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Affiliation(s)
- Lena Steuer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
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15
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Greenfield JL, Di Nuzzo D, Evans EW, Senanayak SP, Schott S, Deacon JT, Peugeot A, Myers WK, Sirringhaus H, Friend RH, Nitschke JR. Electrically Induced Mixed Valence Increases the Conductivity of Copper Helical Metallopolymers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2100403. [PMID: 33955595 DOI: 10.1002/adma.202100403] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 03/11/2021] [Indexed: 06/12/2023]
Abstract
Controlling the flow of electrical current at the nanoscale typically requires complex top-down approaches. Here, a bottom-up approach is employed to demonstrate resistive switching within molecular wires that consist of double-helical metallopolymers and are constructed by self-assembly. When the material is exposed to an electric field, it is determined that ≈25% of the copper atoms oxidize from CuI to CuII , without rupture of the polymer chain. The ability to sustain such a high level of oxidation is unprecedented in a copper-based molecule: it is made possible here by the double helix compressing in order to satisfy the new coordination geometry required by CuII . This mixed-valence structure exhibits a 104 -fold increase in conductivity, which is projected to last on the order of years. The increase in conductivity is explained as being promoted by the creation, upon oxidation, of partly filled d z 2 orbitals aligned along the mixed-valence copper array; the long-lasting nature of the change in conductivity is due to the structural rearrangement of the double-helix, which poses an energetic barrier to re-reduction. This work establishes helical metallopolymers as a new platform for controlling currents at the nanoscale.
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Affiliation(s)
- Jake L Greenfield
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Daniele Di Nuzzo
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Emrys W Evans
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | | | - Sam Schott
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Jason T Deacon
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Adele Peugeot
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - William K Myers
- Centre for Advanced ESR, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Henning Sirringhaus
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Richard H Friend
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Jonathan R Nitschke
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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16
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Kröckert KW, Mannsperger JS, Rösener T, Hoffmann A, Herres‐Pawlis S. Increasing the Activity of Copper Guanidine Quinoline Catalysts: Substitution at the Quinoline Backbone Leads to Highly Active Complexes for ATRP. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000461] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | - Thomas Rösener
- Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1A 52074 Aachen
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1A 52074 Aachen
| | - Sonja Herres‐Pawlis
- Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1A 52074 Aachen
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17
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Sanchez-Cano C, Alvarez-Puebla RA, Abendroth JM, Beck T, Blick R, Cao Y, Caruso F, Chakraborty I, Chapman HN, Chen C, Cohen BE, Conceição ALC, Cormode DP, Cui D, Dawson KA, Falkenberg G, Fan C, Feliu N, Gao M, Gargioni E, Glüer CC, Grüner F, Hassan M, Hu Y, Huang Y, Huber S, Huse N, Kang Y, Khademhosseini A, Keller TF, Körnig C, Kotov NA, Koziej D, Liang XJ, Liu B, Liu S, Liu Y, Liu Z, Liz-Marzán LM, Ma X, Machicote A, Maison W, Mancuso AP, Megahed S, Nickel B, Otto F, Palencia C, Pascarelli S, Pearson A, Peñate-Medina O, Qi B, Rädler J, Richardson JJ, Rosenhahn A, Rothkamm K, Rübhausen M, Sanyal MK, Schaak RE, Schlemmer HP, Schmidt M, Schmutzler O, Schotten T, Schulz F, Sood AK, Spiers KM, Staufer T, Stemer DM, Stierle A, Sun X, Tsakanova G, Weiss PS, Weller H, Westermeier F, Xu M, Yan H, Zeng Y, Zhao Y, Zhao Y, Zhu D, Zhu Y, Parak WJ. X-ray-Based Techniques to Study the Nano-Bio Interface. ACS NANO 2021; 15:3754-3807. [PMID: 33650433 PMCID: PMC7992135 DOI: 10.1021/acsnano.0c09563] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/25/2021] [Indexed: 05/03/2023]
Abstract
X-ray-based analytics are routinely applied in many fields, including physics, chemistry, materials science, and engineering. The full potential of such techniques in the life sciences and medicine, however, has not yet been fully exploited. We highlight current and upcoming advances in this direction. We describe different X-ray-based methodologies (including those performed at synchrotron light sources and X-ray free-electron lasers) and their potentials for application to investigate the nano-bio interface. The discussion is predominantly guided by asking how such methods could better help to understand and to improve nanoparticle-based drug delivery, though the concepts also apply to nano-bio interactions in general. We discuss current limitations and how they might be overcome, particularly for future use in vivo.
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Affiliation(s)
- Carlos Sanchez-Cano
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 182, 20014 Donostia San Sebastián, Spain
| | - Ramon A. Alvarez-Puebla
- Universitat
Rovira i Virgili, 43007 Tarragona, Spain
- ICREA, Passeig Lluís
Companys 23, 08010 Barcelona, Spain
| | - John M. Abendroth
- Department
of Materials Science and Engineering, Stanford
University, Stanford, California 94305, United States
| | - Tobias Beck
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Robert Blick
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Yuan Cao
- Department
of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces
Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Frank Caruso
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology
and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Indranath Chakraborty
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Henry N. Chapman
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Centre
for Ultrafast Imaging, Universität
Hamburg, 22761 Hamburg, Germany
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Chunying Chen
- National
Center for Nanoscience and Technology (NCNST), 100190 Beijing China
| | - Bruce E. Cohen
- The
Molecular Foundry and Division of Molecular Biophysics and Integrated
Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | - David P. Cormode
- Radiology
Department, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Daxiang Cui
- School
of Chemistry and Chemical Engineering, Frontiers Science Center for
Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - Gerald Falkenberg
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Chunhai Fan
- School
of Chemistry and Chemical Engineering, Frontiers Science Center for
Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Neus Feliu
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- CAN, Fraunhofer Institut, 20146 Hamburg, Germany
| | - Mingyuan Gao
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Elisabetta Gargioni
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Claus-C. Glüer
- Section
Biomedical Imaging, Department of Radiology and Neuroradiology, University Medical Clinic Schleswig-Holstein and Christian-Albrechts-University
Kiel, 24105 Kiel, Germany
| | - Florian Grüner
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Universität
Hamburg and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Moustapha Hassan
- Karolinska University Hospital, Huddinge, and Karolinska
Institutet, 17177 Stockholm, Sweden
| | - Yong Hu
- College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Yalan Huang
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Samuel Huber
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Nils Huse
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Yanan Kang
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation, Los Angeles, California 90049, United States
| | - Thomas F. Keller
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Christian Körnig
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Universität
Hamburg and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Nicholas A. Kotov
- Department
of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces
Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Michigan
Institute for Translational Nanotechnology (MITRAN), Ypsilanti, Michigan 48198, United States
| | - Dorota Koziej
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Xing-Jie Liang
- National
Center for Nanoscience and Technology (NCNST), 100190 Beijing China
| | - Beibei Liu
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology,
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 China
| | - Yang Liu
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Ziyao Liu
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Luis M. Liz-Marzán
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 182, 20014 Donostia San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
- Centro de Investigación Biomédica
en Red de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN), Paseo de Miramon 182, 20014 Donostia-San Sebastián, Spain
| | - Xiaowei Ma
- National
Center for Nanoscience and Technology (NCNST), 100190 Beijing China
| | - Andres Machicote
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Wolfgang Maison
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Adrian P. Mancuso
- European XFEL, 22869 Schenefeld, Germany
- Department of Chemistry and Physics, La
Trobe Institute for Molecular
Science, La Trobe University, Melbourne 3086, Victoria, Australia
| | - Saad Megahed
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Bert Nickel
- Sektion Physik, Ludwig Maximilians Universität
München, 80539 München, Germany
| | - Ferdinand Otto
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Cristina Palencia
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | | | - Arwen Pearson
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Oula Peñate-Medina
- Section
Biomedical Imaging, Department of Radiology and Neuroradiology, University Medical Clinic Schleswig-Holstein and Christian-Albrechts-University
Kiel, 24105 Kiel, Germany
| | - Bing Qi
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Joachim Rädler
- Sektion Physik, Ludwig Maximilians Universität
München, 80539 München, Germany
| | - Joseph J. Richardson
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology
and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Axel Rosenhahn
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Kai Rothkamm
- Department
of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Michael Rübhausen
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | | | - Raymond E. Schaak
- Department of Chemistry, Department of Chemical Engineering,
and
Materials Research Institute, The Pennsylvania
State University, University Park, Pensylvania 16802, United States
| | - Heinz-Peter Schlemmer
- Department of Radiology, German Cancer
Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Marius Schmidt
- Department of Physics, University
of Wisconsin-Milwaukee, 3135 N. Maryland Avenue, Milwaukee, Wisconsin 53211, United States
| | - Oliver Schmutzler
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Universität
Hamburg and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | | | - Florian Schulz
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - A. K. Sood
- Department of Physics, Indian Institute
of Science, Bangalore 560012, India
| | - Kathryn M. Spiers
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Theresa Staufer
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Universität
Hamburg and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Dominik M. Stemer
- California NanoSystems Institute, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Andreas Stierle
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Xing Sun
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- Molecular Science and Biomedicine Laboratory (MBL) State
Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry
and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Gohar Tsakanova
- Institute of Molecular Biology of National
Academy of Sciences of
Republic of Armenia, 7 Hasratyan str., 0014 Yerevan, Armenia
- CANDLE Synchrotron Research Institute, 31 Acharyan str., 0040 Yerevan, Armenia
| | - Paul S. Weiss
- California NanoSystems Institute, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Bioengineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Horst Weller
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- CAN, Fraunhofer Institut, 20146 Hamburg, Germany
| | - Fabian Westermeier
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Ming Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology,
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 China
| | - Huijie Yan
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Yuan Zeng
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Ying Zhao
- Karolinska University Hospital, Huddinge, and Karolinska
Institutet, 17177 Stockholm, Sweden
| | - Yuliang Zhao
- National
Center for Nanoscience and Technology (NCNST), 100190 Beijing China
| | - Dingcheng Zhu
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
| | - Ying Zhu
- Bioimaging Center, Shanghai Synchrotron Radiation Facility,
Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Division of Physical Biology, CAS Key Laboratory
of Interfacial
Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Wolfgang J. Parak
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 182, 20014 Donostia San Sebastián, Spain
- Mathematics,
Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
- School
of Chemistry and Chemical Engineering, Frontiers Science Center for
Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
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18
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Das A, Hessin C, Ren Y, Desage-El Murr M. Biological concepts for catalysis and reactivity: empowering bioinspiration. Chem Soc Rev 2020; 49:8840-8867. [PMID: 33107878 DOI: 10.1039/d0cs00914h] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biological systems provide attractive reactivity blueprints for the design of challenging chemical transformations. Emulating the operating mode of natural systems may however not be so easy and direct translation of structural observations does not always afford the anticipated efficiency. Metalloenzymes rely on earth-abundant metals to perform an incredibly wide range of chemical transformations. To do so, enzymes in general have evolved tools and tricks to enable control of such reactivity. The underlying concepts related to these tools are usually well-known to enzymologists and bio(inorganic) chemists but may be a little less familiar to organometallic chemists. So far, the field of bioinspired catalysis has greatly focused on the coordination sphere and electronic effects for the design of functional enzyme models but might benefit from a paradigm shift related to recent findings in biological systems. The goal of this review is to bring these fields closer together as this could likely result in the development of a new generation of highly efficient bioinspired systems. This contribution covers the fields of redox-active ligands, entatic state reactivity, energy conservation through electron bifurcation, and quantum tunneling for C-H activation.
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Affiliation(s)
- Agnideep Das
- Université de Strasbourg, Institut de Chimie, UMR CNRS 7177, 67000 Strasbourg, France.
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19
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Schäfer PM, Herres-Pawlis S. Robust Guanidine Metal Catalysts for the Ring-Opening Polymerization of Lactide under Industrially Relevant Conditions. Chempluschem 2020; 85:1044-1052. [PMID: 32449840 DOI: 10.1002/cplu.202000252] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/30/2020] [Indexed: 01/21/2023]
Abstract
The increasing awareness of sustainability has led to enormous growth of the demand for bio-based and biodegradable polymers such as poly(lactide) (PLA). In industry, polymerization of lactide is currently carried out using tin catalysts (e. g., tin(II) ethyl hexanoate, Sn(Oct)2 ). Since the catalyst remains in the polymer, it can accumulate in the soil or in the human body after degradation and cause damage due to its toxicity. Therefore, a search for a suitable substitute for this catalyst has been going on for decades. Guanidine metal complexes prove to be excellent catalysts in the polymerization of lactide. They are not only convincing because of their activity and the synthesis of high molar mass polymers, but also show a high robustness against high temperatures, oxidation as well as residual protic impurities in the monomer. Herein, key zinc and iron guanidine complexes are discussed with respect to their apparent rate constant (kapp ) and rate constant of propagation (kp ), produced molar masses and the mechanism involved.
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Affiliation(s)
- Pascal M Schäfer
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Sonja Herres-Pawlis
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
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20
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Llanos L, Vera C, Vega A, Aravena D, Lemus L. Reactivity of Cu IN 4 Flattened Complexes: Interplay between Coordination Geometry and Ligand Flexibility. Inorg Chem 2020; 59:15061-15073. [PMID: 33021785 DOI: 10.1021/acs.inorgchem.0c02037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The relation between redox activity and coordination geometry in CuIN4 complexes indicates that more flattened structures tend to be more reactive. Such a preorganization of the ligand confers to the complex geometries closer to a transition state, which has been termed the "entatic" state in metalloproteins, more recently extending this concept for copper complexes. However, many aspects of the redox chemistry of CuI complexes cannot be explained only by flattening. For instance, the role of ligand flexibility in this context is an open debate nowadays. To analyze this point, we studied oxidation properties of a series of five monometallic CuI Schiff-base complexes, [CuI(Ln)]+, which span a range of geometries from a distorted square planar (n = 3) to a distorted tetrahedron (n = 6, 7). This stepped control of the structure around the CuI atom allows us to explore the effect of the flattening distortion on both the electronic and redox properties through the series. Experimental studies were complemented by a theoretical analysis based on density functional theory calculations. As expected, oxidation was favored in the flattened structures, spanning a broad potential window of 370 mV for the complete series. This orderly behavior was tested in the reductive dehalogenation reaction of tetrachloroethane (TCE). Kinetic studies show that CuI oxidation by TCE is faster as the flattening distortion is higher and the oxidation potentials of the metal are lower. However, the most reactive complex was not the more planar, contradicting the trend expected from oxidation potentials. The origin of this irregularity is related to ligand flexibility and its connection with the atom/electron transfer reaction path, highlighting the need to consider effects beyond flattening distortion to better understand the reactivity of this important class of complexes.
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Affiliation(s)
- Leonel Llanos
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estacio'n Central, Santiago, Chile
| | - Cristian Vera
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estacio'n Central, Santiago, Chile
| | - Andrés Vega
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andrés Bello, Quillota 980, Viña del Mar, Chile.,Centro para el Desarrollo de Nanociencias y Nanotecnología, CEDENNA, Santiago, Chile
| | - Daniel Aravena
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estacio'n Central, Santiago, Chile
| | - Luis Lemus
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estacio'n Central, Santiago, Chile
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21
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Balogh RK, Gyurcsik B, Jensen M, Thulstrup PW, Köster U, Christensen NJ, Mørch FJ, Jensen ML, Jancsó A, Hemmingsen L. Flexibility of the CueR Metal Site Probed by Instantaneous Change of Element and Oxidation State from Ag I to Cd II. Chemistry 2020; 26:7451-7457. [PMID: 32045037 PMCID: PMC7317920 DOI: 10.1002/chem.202000132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Indexed: 02/06/2023]
Abstract
Selectivity for monovalent metal ions is an important facet of the function of the metalloregulatory protein CueR. 111Ag perturbed angular correlation of γ‐rays (PAC) spectroscopy probes the metal site structure and the relaxation accompanying the instantaneous change from AgI to CdII upon 111Ag radioactive decay. That is, a change from AgI, which activates transcription, to CdII, which does not. In the frozen state (−196 °C) two nuclear quadrupole interactions (NQIs) are observed; one (NQI1) agrees well with two coordinating thiolates and an additional longer contact to the S77 backbone carbonyl, and the other (NQI2) reflects that CdII has attracted additional ligand(s). At 1 °C only NQI2 is observed, demonstrating that relaxation to this structure occurs within ≈10 ns of the decay of 111Ag. Thus, transformation from AgI to CdII rapidly disrupts the functional linear bis(thiolato)AgI metal site structure. This inherent metal site flexibility may be central to CueR function, leading to remodelling into a non‐functional structure upon binding of non‐cognate metal ions. In a broader perspective, 111Ag PAC spectroscopy may be applied to probe the flexibility of protein metal sites.
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Affiliation(s)
- Ria K Balogh
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary
| | - Béla Gyurcsik
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary
| | - Mikael Jensen
- Hevesy Laboratory, DTU-Health, Technical University of Denmark, Frederiksborgvej 399, 4000, Roskilde, Denmark
| | - Peter W Thulstrup
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Ulli Köster
- Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, France
| | - Niels Johan Christensen
- Department of Chemistry, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1, 871, Frederiksberg C, Denmark
| | - Frederik J Mørch
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Marianne L Jensen
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Attila Jancsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, 6720, Szeged, Hungary
| | - Lars Hemmingsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
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22
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Smolentsev G, Milne CJ, Guda A, Haldrup K, Szlachetko J, Azzaroli N, Cirelli C, Knopp G, Bohinc R, Menzi S, Pamfilidis G, Gashi D, Beck M, Mozzanica A, James D, Bacellar C, Mancini GF, Tereshchenko A, Shapovalov V, Kwiatek WM, Czapla-Masztafiak J, Cannizzo A, Gazzetto M, Sander M, Levantino M, Kabanova V, Rychagova E, Ketkov S, Olaru M, Beckmann J, Vogt M. Taking a snapshot of the triplet excited state of an OLED organometallic luminophore using X-rays. Nat Commun 2020; 11:2131. [PMID: 32358505 PMCID: PMC7195477 DOI: 10.1038/s41467-020-15998-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 04/07/2020] [Indexed: 12/21/2022] Open
Abstract
OLED technology beyond small or expensive devices requires light-emitters, luminophores, based on earth-abundant elements. Understanding and experimental verification of charge transfer in luminophores are needed for this development. An organometallic multicore Cu complex comprising Cu–C and Cu–P bonds represents an underexplored type of luminophore. To investigate the charge transfer and structural rearrangements in this material, we apply complementary pump-probe X-ray techniques: absorption, emission, and scattering including pump-probe measurements at the X-ray free-electron laser SwissFEL. We find that the excitation leads to charge movement from C- and P- coordinated Cu sites and from the phosphorus atoms to phenyl rings; the Cu core slightly rearranges with 0.05 Å increase of the shortest Cu–Cu distance. The use of a Cu cluster bonded to the ligands through C and P atoms is an efficient way to keep structural rigidity of luminophores. Obtained data can be used to verify computational methods for the development of luminophores. OLED materials based on thermally activated delayed fluorescence have promising efficiency. Here, the authors investigate an organometallic multicore Cu complex as luminophore, by pump-probe X-ray techniques at three different facilities deriving a complete picture of the charge transfer in the triplet excited state.
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Affiliation(s)
| | | | - Alexander Guda
- The Smart Materials Research Institute, Southern Federal University, 344090, Rostov-on-Don, Russia
| | - Kristoffer Haldrup
- Physics Department, Technical University of Denmark, DK-2800, Kongens Lyngby, Denmark
| | - Jakub Szlachetko
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342, Kraków, Poland
| | | | | | - Gregor Knopp
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | - Rok Bohinc
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | - Samuel Menzi
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | | | - Dardan Gashi
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | - Martin Beck
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | | | - Daniel James
- Paul Scherrer Institute, 5232, Villigen, Switzerland
| | - Camila Bacellar
- Paul Scherrer Institute, 5232, Villigen, Switzerland.,Laboratory for Ultrafast Spectroscopy, Lausanne Center for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - Giulia F Mancini
- Paul Scherrer Institute, 5232, Villigen, Switzerland.,Laboratory for Ultrafast Spectroscopy, Lausanne Center for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - Andrei Tereshchenko
- The Smart Materials Research Institute, Southern Federal University, 344090, Rostov-on-Don, Russia
| | - Victor Shapovalov
- The Smart Materials Research Institute, Southern Federal University, 344090, Rostov-on-Don, Russia
| | - Wojciech M Kwiatek
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342, Kraków, Poland
| | | | - Andrea Cannizzo
- Institute of Applied Physics, University of Bern, 3012, Bern, Switzerland
| | - Michela Gazzetto
- Institute of Applied Physics, University of Bern, 3012, Bern, Switzerland
| | - Mathias Sander
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Matteo Levantino
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Victoria Kabanova
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Elena Rychagova
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Tropinina, 49, Nizhny Novgorod, 603950, Russia
| | - Sergey Ketkov
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Tropinina, 49, Nizhny Novgorod, 603950, Russia
| | - Marian Olaru
- Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobenerstr. 7, 28359, Bremen, Germany
| | - Jens Beckmann
- Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobenerstr. 7, 28359, Bremen, Germany
| | - Matthias Vogt
- Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobenerstr. 7, 28359, Bremen, Germany. .,Martin-Luther-Universität Halle-Wittenberg Naturwissenschaftliche Fakultät II, Institut für Chemie, Anorganische Chemie, D-06120, Halle, Germany.
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23
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Ren Y, Forté J, Cheaib K, Vanthuyne N, Fensterbank L, Vezin H, Orio M, Blanchard S, Desage-El Murr M. Optimizing Group Transfer Catalysis by Copper Complex with Redox-Active Ligand in an Entatic State. iScience 2020; 23:100955. [PMID: 32199288 PMCID: PMC7083792 DOI: 10.1016/j.isci.2020.100955] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 01/14/2020] [Accepted: 02/25/2020] [Indexed: 01/07/2023] Open
Abstract
Metalloenzymes use earth-abundant non-noble metals to perform high-fidelity transformations in the biological world. To ensure chemical efficiency, metalloenzymes have acquired evolutionary reactivity-enhancing tools. Among these, the entatic state model states that a strongly distorted geometry induced by ligands around a metal center gives rise to an energized structure called entatic state, strongly improving the reactivity. However, the original definition refers both to the transfer of electrons or chemical groups, whereas the chemical application of this concept in synthetic systems has mostly focused on electron transfer, therefore eluding chemical transformations. Here we report that a highly strained redox-active ligand enables a copper complex to perform catalytic nitrogen- and carbon-group transfer in as fast as 2 min, thus exhibiting a strong increase in reactivity compared with its unstrained analogue. This report combines two reactivity-enhancing features from metalloenzymes, entasis and redox cofactors, applied to group-transfer catalysis. We design a catalyst interfacing two reactivity-enhancing tools from metalloenzymes This work merges redox-active cofactors and entatic state reactivity The modifications in the coordination sphere lead to enhanced catalytic behavior These results open perspectives in bioinspired catalysis and group-transfer reactions
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Affiliation(s)
- Yufeng Ren
- Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 75005 Paris, France
| | - Jeremy Forté
- Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 75005 Paris, France
| | - Khaled Cheaib
- Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 75005 Paris, France
| | - Nicolas Vanthuyne
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, UMR CNRS 7313, 13397 Marseille, France
| | - Louis Fensterbank
- Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 75005 Paris, France
| | - Hervé Vezin
- Université des Sciences et Technologies de Lille, LASIR, UMR CNRS 8516, 59655 Villeneuve d'Ascq Cedex, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, UMR CNRS 7313, 13397 Marseille, France
| | - Sébastien Blanchard
- Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 75005 Paris, France
| | - Marine Desage-El Murr
- Université de Strasbourg, Institut de Chimie, UMR CNRS 7177, 67000 Strasbourg, France.
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24
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Giereth R, Mengele AK, Frey W, Kloß M, Steffen A, Karnahl M, Tschierlei S. Copper(I) Phosphinooxazoline Complexes: Impact of the Ligand Substitution and Steric Demand on the Electrochemical and Photophysical Properties. Chemistry 2020; 26:2675-2684. [PMID: 31747089 PMCID: PMC7065177 DOI: 10.1002/chem.201904379] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Indexed: 12/29/2022]
Abstract
A series of seven homoleptic CuI complexes based on hetero-bidentate P^N ligands was synthesized and comprehensively characterized. In order to study structure-property relationships, the type, size, number and configuration of substituents at the phosphinooxazoline (phox) ligands were systematically varied. To this end, a combination of X-ray diffraction, NMR spectroscopy, steady-state absorption and emission spectroscopy, time-resolved emission spectroscopy, quenching experiments and cyclic voltammetry was used to assess the photophysical and electrochemical properties. Furthermore, time-dependent density functional theory calculations were applied to also analyze the excited state structures and characteristics. Surprisingly, a strong dependency on the chirality of the respective P^N ligand was found, whereas the specific kind and size of the different substituents has only a minor impact on the properties in solution. Most importantly, all complexes except C3 are photostable in solution and show fully reversible redox processes. Sacrificial reductants were applied to demonstrate a successful electron transfer upon light irradiation. These properties render this class of photosensitizers as potential candidates for solar energy conversion issues.
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Affiliation(s)
- Robin Giereth
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Alexander K Mengele
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Marvin Kloß
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Andreas Steffen
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Michael Karnahl
- Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Stefanie Tschierlei
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
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25
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Koide A, Uemura Y, Kido D, Wakisaka Y, Takakusagi S, Ohtani B, Niwa Y, Nozawa S, Ichiyanagi K, Fukaya R, Adachi SI, Katayama T, Togashi T, Owada S, Yabashi M, Yamamoto Y, Katayama M, Hatada K, Yokoyama T, Asakura K. Photoinduced anisotropic distortion as the electron trapping site of tungsten trioxide by ultrafast W L 1-edge X-ray absorption spectroscopy with full potential multiple scattering calculations. Phys Chem Chem Phys 2020; 22:2615-2621. [PMID: 30989154 DOI: 10.1039/c9cp01332f] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Understanding the excited state of photocatalysts is significant to improve their activity for water splitting reaction. X-ray absorption fine structure (XAFS) spectroscopy in X-ray free electron lasers (XFEL) is a powerful method to address dynamic changes in electronic states and structures of photocatalysts in the excited state in ultrafast short time scales. The ultrafast atomic-scale local structural change in photoexcited WO3 was observed by W L1 edge XAFS spectroscopy using an XFEL. An anisotropic local distortion around the W atom could reproduce well the spectral features at a delay time of 100 ps after photoexcitation based on full potential multiple scattering calculations. The distortion involved the movement of W to shrink the shortest W-O bonds and elongate the longest one. The movement of the W atom could be explained by the filling of the dxy and dzx orbitals, which were originally located at the bottom of the conduction band with photoexcited electrons.
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Affiliation(s)
- Akihiro Koide
- Institute for Molecular Science, Myodaiji-cho, Okazaki 444-8585, Japan. and Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France
| | - Yohei Uemura
- Institute for Molecular Science, Myodaiji-cho, Okazaki 444-8585, Japan. and Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands.
| | - Daiki Kido
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Yuki Wakisaka
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Satoru Takakusagi
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Bunsho Ohtani
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
| | - Yasuhiro Niwa
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Shunsuke Nozawa
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Kohei Ichiyanagi
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Ryo Fukaya
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | - Shin-Ichi Adachi
- Photon Factory, Institute for Materials Structure Sciene, KEK, Tsukuba 305-0801, Japan
| | | | | | - Shigeki Owada
- RIKEN SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Makina Yabashi
- RIKEN SPring-8 Center, Kouto Sayo-cho, Hyogo 679-5148, Japan
| | - Yusaku Yamamoto
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Misaki Katayama
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Keisuke Hatada
- Department of Physics, University of Toyama, Toyama 930-8555, Japan
| | | | - Kiyotaka Asakura
- Institute for Catalysis Hokkaido University, Sapporo 001-0021, Japan.
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26
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Non-covalent intramolecular interactions through ligand-design promoting efficient photoluminescence from transition metal complexes. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213094] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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27
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Punt PM, Stratmann LM, Sevim S, Knauer L, Strohmann C, Clever GH. Heteroleptic Coordination Environments in Metal-Mediated DNA G-Quadruplexes. Front Chem 2020; 8:26. [PMID: 32064249 PMCID: PMC7000376 DOI: 10.3389/fchem.2020.00026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 01/09/2020] [Indexed: 12/28/2022] Open
Abstract
The presence of metal centers with often highly conserved coordination environments is crucial for roughly half of all proteins, having structural, regulatory, or enzymatic function. To understand and mimic the function of metallo-enzymes, bioinorganic chemists pursue the challenge of synthesizing model compounds with well-defined, often heteroleptic metal sites. Recently, we reported the design of tailored homoleptic coordination environments for various transition metal cations based on unimolecular DNA G-quadruplex structures, templating the regioselective positioning of imidazole ligandosides LI. Here, we expand this modular system to more complex, heteroleptic coordination environments by combining LI with a new benzoate ligandoside LB within the same oligonucleotide. The modifications still allow the correct folding of parallel tetramolecular and antiparallel unimolecular G-quadruplexes. Interestingly, the incorporation of LB results in strong destabilization expressed in lower thermal denaturation temperatures Tm. While no transition metal cations could be bound by G-quadruplexes containing only LB, heteroleptic derivatives containing both LI and LB were found to complex CuII, NiII, and ZnII. Especially in case of CuII we found strong stabilizations of up to ΔTm = +34°C. The here shown system represents an important step toward the design of more complex coordination environments inside DNA scaffolds, promising to culminate in the preparation of functional metallo-DNAzymes.
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Affiliation(s)
- Philip M Punt
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Lukas M Stratmann
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Sinem Sevim
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Lena Knauer
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Carsten Strohmann
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Guido H Clever
- Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
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28
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Zhang Z, Tizzard GJ, Williams JAG, Goldup SM. Rotaxane Pt II-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour. Chem Sci 2020; 11:1839-1847. [PMID: 34123277 PMCID: PMC8148368 DOI: 10.1039/c9sc05507j] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report an approach to rotaxanes in which the metal ion of a cyclometallated PtII luminophore is embedded in the space created by the mechanical bond. Our results show that the interlocked ligand environment stabilises a normally labile PtII–triazole bond against displacement by competing ligands and that the crowded environment of the mechanical bond retards oxidation of the PtII centre, without perturbing the photophysical properties of the complex. When an additional pyridyl binding site is included in the axle, the luminescence of the PtII centre is quenched, an effect that can be selectively reversed by the binding of AgI. Our results suggest that readily available interlocked metal-based phosphors can be designed to be stimuli responsive and have advantages as stabilised triplet harvesting dopants for device applications. We report an approach to interlocked PtII luminophores in which the mechanical bond stabilises the coordination environment of the embedded metal ion.![]()
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Affiliation(s)
- Zhihui Zhang
- Chemistry, University of Southampton Southampton SO51 5PG UK
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29
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Mirzoyan R, Hadt RG. The dynamic ligand field of a molecular qubit: decoherence through spin–phonon coupling. Phys Chem Chem Phys 2020; 22:11249-11265. [DOI: 10.1039/d0cp00852d] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A ligand field model highlights chemical design principles for the development of room temperature coherent materials for quantum information processing.
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Affiliation(s)
- Ruben Mirzoyan
- Division of Chemistry and Chemical Engineering
- Arthur Amos Noyes Laboratory of Chemical Physics
- California Institute of Technology
- Pasadena
- USA
| | - Ryan G. Hadt
- Division of Chemistry and Chemical Engineering
- Arthur Amos Noyes Laboratory of Chemical Physics
- California Institute of Technology
- Pasadena
- USA
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30
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Stroscio GD, Ribson RD, Hadt RG. Quantifying Entatic States in Photophysical Processes: Applications to Copper Photosensitizers. Inorg Chem 2019; 58:16800-16817. [DOI: 10.1021/acs.inorgchem.9b02976] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gautam D. Stroscio
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
| | - Ryan D. Ribson
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
| | - Ryan G. Hadt
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
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31
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Zerk TJ, Saouma CT, Mayer JM, Tolman WB. Low Reorganization Energy for Electron Self-Exchange by a Formally Copper(III,II) Redox Couple. Inorg Chem 2019; 58:14151-14158. [PMID: 31577145 DOI: 10.1021/acs.inorgchem.9b02185] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The rate constant for electron self-exchange (k11) between LCuOH and [LCuOH]- (L = bis-2,6-(2,6-diisopropylphenyl)carboximidopyridine) was determined using the Marcus cross relation. This work involved measurement of the rate of the cross-reaction between [Bu4N][LCuOH] and [Fc][BAr4F] (Fc+ = ferrocenium; BAr4F = tetrakis[3,5-bis(trifluoromethyl)phenyl]borate)) by stopped-flow methods at -88 °C in CH2Cl2 and measurement of the equilibrium constant for the redox process by UV-vis titrations under the same conditions. A value of k11 = 3 × 104 M-1 s-1 (-88 °C) led to estimation of a value 9 × 106 M-1 s-1 at 25 °C, which is among the highest values known for copper redox couples. Further Marcus analysis enabled determination of a low reorganization energy, λ = 0.95 ± 0.17 eV, attributed to minimal structural variation between the redox partners. In addition, the reaction entropy (ΔS°) associated with the LCuOH/[LCuOH]- self-exchange was determined from the temperature dependence of the redox potentials, and found to be dependent upon ionic strength. Comparisons to other Cu redox systems and potential new applications for the formally CuIII,II system are discussed.
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Affiliation(s)
- Timothy J Zerk
- Department of Chemistry , Washington University in St. Louis , One Brookings Hall, Campus Box 1134 , St. Louis , Missouri 63130-4899 , United States
| | - Caroline T Saouma
- Department of Chemistry , University of Utah , 315 S 1400 E , Salt Lake City , Utah 84112 , United States
| | - James M Mayer
- Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06520-8107 , United States
| | - William B Tolman
- Department of Chemistry , Washington University in St. Louis , One Brookings Hall, Campus Box 1134 , St. Louis , Missouri 63130-4899 , United States
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32
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Schön F, Kaifer E, Himmel H. Catalytic Aerobic Phenol Homo‐ and Cross‐Coupling Reactions with Copper Complexes Bearing Redox‐Active Guanidine Ligands. Chemistry 2019; 25:8279-8288. [DOI: 10.1002/chem.201900583] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Indexed: 01/12/2023]
Affiliation(s)
- Florian Schön
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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33
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Hossain A, Bhattacharyya A, Reiser O. Copper’s rapid ascent in visible-light photoredox catalysis. Science 2019; 364:364/6439/eaav9713. [DOI: 10.1126/science.aav9713] [Citation(s) in RCA: 276] [Impact Index Per Article: 55.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 03/27/2019] [Indexed: 12/12/2022]
Abstract
Visible-light photoredox catalysis offers a distinct activation mode complementary to thermal transition metal catalyzed reactions. The vast majority of photoredox processes capitalizes on precious metal ruthenium(II) or iridium(III) complexes that serve as single-electron reductants or oxidants in their photoexcited states. As a low-cost alternative, organic dyes are also frequently used but in general suffer from lower photostability. Copper-based photocatalysts are rapidly emerging, offering not only economic and ecological advantages but also otherwise inaccessible inner-sphere mechanisms, which have been successfully applied to challenging transformations. Moreover, the combination of conventional photocatalysts with copper(I) or copper(II) salts has emerged as an efficient dual catalytic system for cross-coupling reactions.
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34
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Nitelet A, Thevenet D, Schiavi B, Hardouin C, Fournier J, Tamion R, Pannecoucke X, Jubault P, Poisson T. Copper-Photocatalyzed Borylation of Organic Halides under Batch and Continuous-Flow Conditions. Chemistry 2019; 25:3262-3266. [PMID: 30600852 DOI: 10.1002/chem.201806345] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Indexed: 12/25/2022]
Abstract
The copper-photocatalyzed borylation of aryl, heteroaryl, vinyl and alkyl halides (I and Br) was reported. The reaction proceeded using a new heteroleptic Cu complex under irradiation with blue LEDs, giving the corresponding boronic-acid esters in good to excellent yields. The reaction was extended to continuous-flow conditions to allow an easy scale-up. The mechanism of the reaction was studied and a mechanism based on a reductive quenching (CuI /CuI */Cu0 ) was suggested.
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Affiliation(s)
- Antoine Nitelet
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Damien Thevenet
- Industrial Research Centre-, Oril Industrie, CS 60125, 76210, Bolbec, France
| | - Bruno Schiavi
- Industrial Research Centre-, Oril Industrie, CS 60125, 76210, Bolbec, France
| | - Christophe Hardouin
- Industrial Research Centre-, Oril Industrie, CS 60125, 76210, Bolbec, France
| | - Jean Fournier
- Industrial Research Centre-, Oril Industrie, CS 60125, 76210, Bolbec, France
| | - Rodolphe Tamion
- Industrial Research Centre-, Oril Industrie, CS 60125, 76210, Bolbec, France
| | - Xavier Pannecoucke
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Philippe Jubault
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Thomas Poisson
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France.,Institut Universitaire de France, 1 rue Descartes, 75231, Paris, France
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35
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Schäfer PM, McKeown P, Fuchs M, Rittinghaus RD, Hermann A, Henkel J, Seidel S, Roitzheim C, Ksiazkiewicz AN, Hoffmann A, Pich A, Jones MD, Herres-Pawlis S. Tuning a robust system: N,O zinc guanidine catalysts for the ROP of lactide. Dalton Trans 2019; 48:6071-6082. [PMID: 30758389 DOI: 10.1039/c8dt04938f] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Non-toxic, highly active and robust complexes are the holy grail as ideal green catalysts for the polymerisation of biorenewable and biodegradable polylactide. Four new zinc guanidine complexes [ZnCl2(TMG4NMe2asme)], [ZnCl2(TMG5Clasme)], [ZnCl2(TMG5Measme)] and [ZnCl2(TMG5NMe2asme)] with different electron-donating and electron-withdrawing groups on the ligand's aromatic backbone have been synthesised. Ligands are derived from low-cost commercially available compounds and have been converted by a three- or four-step synthesis process into the desired ligand in good yields. The compounds have been fully characterised and tested in the ROP of rac-LA under industrially relevant conditions. The complexes are based on the recently published structure [ZnCl2(TMGasme)] which has shown high activity in the polymerisation of lactide at 150 °C. Different substituents in the para-position of the guanidine moiety significantly increase the polymerisation rate whereas positioning substituents in the meta-position causes no change in the reaction rate. With molecular weights over 71 000 g mol-1 being achievable, the best system produces polymers for multiple industrial applications and its polymerisation rate approaches that of Sn(Oct)2. The robust systems are able to polymerise non-purified lactide. The initiation of the polymerisation is suggested to occur due to impurities in the monomer.
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Affiliation(s)
- Pascal M Schäfer
- Institut für Anorganische Chemie, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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36
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Cirulli M, Kaur A, Lewis JEM, Zhang Z, Kitchen JA, Goldup SM, Roessler MM. Rotaxane-Based Transition Metal Complexes: Effect of the Mechanical Bond on Structure and Electronic Properties. J Am Chem Soc 2018; 141:879-889. [DOI: 10.1021/jacs.8b09715] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Martina Cirulli
- School of Biological and Chemical Sciences and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
| | - Amanpreet Kaur
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - James E. M. Lewis
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, 80 Wood Lane, London, W12 0BZ, U.K
| | - Zhihui Zhang
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Jonathan A. Kitchen
- Chemistry, Institute of Natural and Mathematical Sciences, Massey University, Auckland, New Zealand
| | - Stephen M. Goldup
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Maxie M. Roessler
- School of Biological and Chemical Sciences and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
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Ortmeyer J, Vukadinovic Y, Neuba A, Flörke U, Henkel G. Combining a Phenanthroline Moiety with Peralkylated Guanidine Residues: Homometallic Cu
II
, Ni
II
and Zn
II
Halide Complexes with Site‐Differentiating Janus Head Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jochen Ortmeyer
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Yannik Vukadinovic
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Adam Neuba
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Ulrich Flörke
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Gerald Henkel
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
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38
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Stanek J, Konrad M, Mannsperger J, Hoffmann A, Herres-Pawlis S. Influence of Functionalized Substituents on the Electron-Transfer Abilities of Copper Guanidinoquinoline Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Julia Stanek
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Marc Konrad
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Johannes Mannsperger
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander Hoffmann
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institute for Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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39
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Rösener T, Kröckert K, Hoffmann A, Herres-Pawlis S. The Curious Case of a Phenylated Guanidinoquinoline Ligand: Synthesis, Complexes and ATRP Properties of DMEG6phqu. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Rösener
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Konstantin Kröckert
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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40
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Abstract
Bis(guanidine) copper complexes are known for their ability to activate dioxygen. Unfortunately, until now, no bis(guanidine) copper-dioxygen adduct has been able to transfer oxygen to substrates. Using an aromatic backbone, fluorescence properties can be added to the copper(I) complex which renders them useful for later reaction monitoring. The novel bis(guanidine) ligand DMEG2tol stabilizes copper(I) and copper(II) complexes (characterized by single crystal X-ray diffraction, IR spectroscopy, and mass spectrometry) and, after oxygen activation, bis(µ-oxido) dicopper(III) complexes which have been characterized by low-temperature UV/Vis and Raman spectroscopy. These bis(guanidine) stabilized bis(µ-oxido) complexes are able to mediate tyrosinase-like hydroxylation activity as first examples of bis(guanidine) stabilized complexes. The experimental study is accompanied by density functional theory calculations which highlight the special role of the different guanidine donors.
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41
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42
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Schrempp DF, Kaifer E, Himmel HJ. Solvent Control of Ligand-Metal Electron Transfer in Mononuclear Copper Complexes with Redox-Active Bisguanidine Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800525] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- David F. Schrempp
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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43
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Bubrin M, Kvapilová H, Fiedler J, Ehret F, Záliš S, Kaim W. Hybrid α-Diimine/Bis(chalcogenoether) Ligands for Copper(I) and Copper(II) Complexes. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Martina Bubrin
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
| | - Hana Kvapilová
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences; Dolejškova 3 18223 Prague Czech Republic
| | - Jan Fiedler
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences; Dolejškova 3 18223 Prague Czech Republic
| | - Fabian Ehret
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry; The Czech Academy of Sciences; Dolejškova 3 18223 Prague Czech Republic
| | - Wolfgang Kaim
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
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44
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Rösener T, Hoffmann A, Herres-Pawlis S. Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800511] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Rösener
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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45
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46
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Lorenz R, Kaifer E, Wadepohl H, Himmel HJ. Di- and tetranuclear transition metal complexes of a tetrakisguanidino-substituted phenazine dye by stepwise coordination. Dalton Trans 2018; 47:11016-11029. [DOI: 10.1039/c8dt02176g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Coordination of a tetrakisguanidino-substituted phenazine dye in two steps provides rational access to tetranuclear homo- and heterobimetallic complexes.
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Affiliation(s)
- Roxana Lorenz
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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47
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Ziesak A, Steuer L, Kaifer E, Wagner N, Beck J, Wadepohl H, Himmel HJ. Intramolecular metal–ligand electron transfer triggered by co-ligand substitution. Dalton Trans 2018; 47:9430-9441. [DOI: 10.1039/c8dt01234b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Labile co-ligands are attached to a dinuclear copper(i) complex with a redox-active bridging guanidine ligand. Their substitution triggers electron-transfer from the copper atoms to the guanidine.
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Affiliation(s)
- Alexandra Ziesak
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Lena Steuer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Norbert Wagner
- Institut für Anorganische Chemie
- Universität Bonn
- 53121 Bonn
- Germany
| | - Johannes Beck
- Institut für Anorganische Chemie
- Universität Bonn
- 53121 Bonn
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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